//
//  UserAccount.swift
//  SinaWeibo
//
//  Created by yang on 15/11/10.
//  Copyright © 2015年 yang. All rights reserved.
//

import UIKit

class UserAccount: NSObject,NSCoding {
    //用于调用access_token，接口获取授权后的access token
    var access_token: String?
    //access_token的生命周期，单位是秒数。
    var expires_in: NSTimeInterval = 0{
        didSet{
        expires_date = NSDate(timeIntervalSinceNow: expires_in)
        }
    }
    //access_token的过期日期
    var expires_date :NSDate?
    //当前授权用户的UID。
    var uid: String?
    //用户头像地址
    var avatar_large:String?
    //用户名
    var name:String?
    //KVC设置初始值
    init(dict:[String :AnyObject]){
        super.init()
        setValuesForKeysWithDictionary(dict)
    }
    override func setValue(value: AnyObject?, forUndefinedKey key: String) {
    }
    override var description: String {
        let keys = ["access_token","expires_in","uid","avatar_large","name","expires_date"]
        return dictionaryWithValuesForKeys(keys).description
    }
    //归档方法
     func saveAccount(){
        let path = (NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).last! as NSString).stringByAppendingPathComponent("account.plist")
        NSKeyedArchiver.archiveRootObject(self, toFile: path)
    }
    //解档方法
    class func loadAccount() -> UserAccount?{
        let path = (NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).last! as NSString).stringByAppendingPathComponent("account.plist")
        if let account = NSKeyedUnarchiver.unarchiveObjectWithFile(path) as?UserAccount{
            //判断Token是否过期
            if account.expires_date?.compare(NSDate()) == NSComparisonResult.OrderedDescending{
                 return account
            }
        }
        return nil
    }
    //实现 NSCoding 协议方法
    //解档
    required init?(coder aDecoder: NSCoder) {
        
        access_token = aDecoder.decodeObjectForKey("access_token") as?String
        expires_in = aDecoder.decodeDoubleForKey("expires_in")
        uid = aDecoder.decodeObjectForKey("uid") as?String
        avatar_large = aDecoder.decodeObjectForKey("avatar_large") as?String
        name = aDecoder.decodeObjectForKey("name") as?String
        expires_date = aDecoder.decodeObjectForKey("expires_date") as?NSDate
        
    }
    //归档
    func encodeWithCoder(aCoder: NSCoder) {
        
        aCoder.encodeObject(access_token, forKey: "access_token")
        aCoder.encodeDouble(expires_in, forKey: "expires_in")
        aCoder.encodeObject(uid, forKey: "uid")
        aCoder.encodeObject(avatar_large, forKey: "avatar_large")
        aCoder.encodeObject(name, forKey: "name")
         aCoder.encodeObject(expires_date, forKey: "expires_date")

    }
}
